hehe. maybe you are right, i have not thought about that. i assumed the vertebrae bend all a bit, and when i tried to pose the neck once it looked odd from my point of view, i think one bone is not enough. the results that i get with that do not feel natural. http://www.jameda.de/krankheiten-lexikon/bilder/big/559900.jpg here, like this. i think a sequence of vertebrae bones would be the easiest way from a technical point of view. i am not a biology expert ;) despite i was trying to learn some anatomy, and that neck adventure helped me finally find out how posers rigging tools work ;)